Extractions and B-spline curves

Hi

We are using AECOsim building designer V81 (SELECT Series 3) and are forming our 2D model files via the DEM.


We are having problems with extracted curves which, when extracted do not maintain their geometry and are converted to B-splines - this is becoming very problematic especially when we get to annotation stages and cannot pull out a dia or angle. It also produces extremely erratic results at times which bare very little resemblance to the original curves which are based on a sound/regular geometry.

Is there any way to prevent AECOsim from converting everything to a cell or b-spline during extraction? Any advice will be most welcome.

Thanks